Pressed CDs don't suffer bit rot or whole-collection catastrophic failure. In my old incarnation as tech support, I've seen far too many instances of users' only copy of vital data being eaten by hard-drive failure or accidental erasure; stuff on flash drives is even more vulnerable, as the first failure will be catastrophic. Even burn-your-own CDs tend to die slowly.

Techie's Advice: never underestimate the resilience of dead trees, or dents in hard plastic. The failure mechanisms are different, but better understood.